Pope Benedict XVI kisses a baby handed to him by secretary George Ganswein as he greets pilgrims in St. Peter's Square at the Vatican, Wednesday, Feb. 27, 2013. Pope Benedict XVI greeted the Catholic masses in St. Peter's Square Wednesday for the last time before retiring, making several rounds of the square as crowds cheered wildly and stopping to kiss a half-dozen children brought up to him by his secretary. (AP Photo/Gregorio Borgia)